Somewhat related to my dust collection follies, I want to put another vent
in the garage proper, thru, you guessed it, an 18" foundation wall. I don't
have too many other choices, except mebbe venting down the main sewer.
Inyone done dat??
Drilling the hole--6" diam, I think--is doable, as I got rotary hammers, a
bottle of vitamins, etc...
I figgered I would hammer-drill a dozen or so 3/8-1/2 holes thru, and chip
out the webs, to give a reasonably round 6" hole.
But I would like to support sed hole, once drilled, to thwart cracks that
might emanate from it, if left unsupported.
Possibilities: cast iron drain pipe, or a big-assed steam pipe or
electrical coupling, or any sturdy large pipe.
If I then cemented it in real good, it would relieve stress/re-support the
wall, and give me a clean opening.
Is there standard stuff used for this? Ideally it would be compatible w/
Is all this a good idea/bad idea? Wife's not crazy about it.
formerly Droll Troll
Hire someone with a "Core drill" to come in and do it. Pretty much a
big hole saw. Pay the man and you're done.
Another reason to core it; you get a nice smooth surface with no corners
for cracks to start in.
Definately then, hire it out. That way the mess is _their_ fault, not
all i can say is you like to suffer, PV. ive drilled 6" holes in 8"
foundation walls by the above method, and its a hard way to go.
drilling is the easy part, busting out the core is the trick. can't
imagine it in a 18" foundation wall. better get up early and plan on
spending the day on it.
if your foundation is that massive, i can't really see that a 6" hole
is going to bother anything. if it was prone to crack at that point,
putting a cast iron sleeve doesn't seem likely to prevent it.
hopefully, this isn't below grade where you are going to create a leak?
by the way, is there rebar in this foundation? if so, don't hit it!
Second this idea. I had to have 2 of 100mm holes put thru a 150mm
reinforced concrete water tank for overflow pipes. Got a man with a
core drill in & the job was fast, accurate, relatively clean. Cost me
just over $100 IIRC and worth every cent.
18" thick??!!!!?? What? I can't believe your foundation is TRULY 18"
thick! The only structure I know of that thick is the cells at the
company in Amarillo that assembles nuclear weapons for the DOE. Well,
the Hoover dam is actually thicker than that, but I don't think your
house or garage is holding back 600 feet of water!
Can you fill us in on this?
I've punched a similar hole, for exactly the same purpose, through our
foundation/basement wall. We have the hardest concrete ever made, with
tons of Jasper in it.
My scheme is I made a giant punch tool out of a Macpherson strut
rod to fit my air chisel. I sharpen the thing on a bench grinder, and
just wail away at the wall. You get a huge explosion of dust, and the
punch makes progress at about 1/2" a minute. You make a few
penetrations nearby, then apply the punch at an angle, and a huge chunk
comes out. It took 2 days to get through the wall and open the hole up
to take the vent pipe. I have to resharpen the punch every 30 minutes
or so. There's no way you can really do this through 18". Even a core
drill machine will need a lot of setup work and extensions to properly
drill such a hole. A well-equipped driller will have the right gear
for this, but your average guy that drills a few holes for plumbing
and electrical access may not have the extensions.
Stone basement walls are typically 18" (or even more) thick. It has to
do with laying up the stone.
The early settlers in the Minnesota Iron range used to make basement
walls with hand mixed slip formed concrete. To save on expensive cement,
they filled the walls with local rock. As in mostly granite rocks 3" to
15" across. You could get a very solid rock wall with only about 25%
concrete mix. But drilling through this to put in utilities later was
Home Depots that have tool rental departments rent Hilti core drill rigs
and core bits. Can't do much better than Hilti. Other places like United
Rental and Nations Rent should also have core drill rigs.
Apropos of RoyJ's comments, my house was also built by yer 1920's drug
dealer, aka boot-legger/rum runner.
You should see some of what he did, ito concrete reinforcement, barricades,
and supposedly secret passageways, which I have yet to find, altho I think
I've stumbled on a portal or two.
Seems like he was tryna mimic Joe Kennedy et al, rahcheer in Yonkers, NY.
To better accommodate those stellar denizens, Yonkers had, as well, a whole
underground plumbing/pumping system for the illegal caches/distilleries that
abounded at the time--and they still exist, altho non-functioning, of
course--I think. :)
One of the larger buildings on the corner by me was sposedly a
hangout/eatery of Dutch Schultz et al, w/ a hotel style restaurant in the
basement (and spirits plumbing), long since closed.
Fascinating history. W/ streets w/ names like Gene Kruppa Blvd.
Now, how can you not love a place like this?
Well actually, it's perty easy not to love it.... Taxes, donchaknow... and
And the tradition, of sorts, continues today. In my li'l enclave, homes are
selling for *well over* $1M, as various religious/ethnic groups vie for
dominance and 5,000 sq ft old houses.
Man, would they love to get ME out!!
And Man, is it gonna cost'em, esp after I put my Voice of the Theatre
Speaker Systems on the lawn, and start playing Salsa and gangsta rap, full
But, here's the kicker:
Just a few blocks away are all the drugs/guns/boodilicious booty a coked-up
Wall Street Broker/Manhattan Criminal Lawyer (is "criminal lawyer" a double
entendre??) could want--all very reasonably priced.
Of which said juxtapositioned bargains will be made quite clear in my sales
ad, for when I GTF out of this place.
Iny offers?? :)
Hey, but I got one helluva machine shop in sed bootlegger's reinforced
Yeah, replete w/ 18" stone walls, and 9.5" poured concrete walls *inside*,
and 1/4" steel plate doors/jambs. Goodgawd.....
And actually, at the Indian Point nuclear reactors over here, just an
explosion-away up the Hudson from me, I believe those walls are *many many*
feet thick, according to a machinist I knew who did work up there. There
are a few types of structures w/ super-thick walls.
Indian Point is one of the last bastions of cheap real estate around here,
and even that's getting stoopit, as apparently glowing in the dark is
becoming somewhat chic these days--an extension of the current tattoo
idiocy, I would imagine.
If I see one more tattoo at the apex of a butt-crack.....
And who needs a thyroid gland, anyway?
1/2 holes in these walls actually go pretty easy w/ my big-assed over-priced
Bosch rotary hammer (electric). It actually has quite a bit of oomph as a
demolition hammer as well, about 80% of their electric demolition hammer,
which I also have.
Actually looking for an excuse to use them, as the wife glares at me
regularly for having bought them.
More boy-toys, dear? And still no kitchen for me????
Coming, dear, coming....
formerly Droll Troll
Before my parents were married, my mother had purchased the central
Ontario house where my father was born (had belonged to his maternal
grandparents) as a vacation residence for her city family. When
planning marriage, Dad wanted to have the driven well pump in the
summer kitchen during warm weather and in the main house all winter.
This meant an offset of the 1-1/4" suction pipe through the three foot
stone and mortar foundation. Mother's university student, younger
brother was given the task of making the hole during his holiday
visit. A week latter, he managed to penetrate the wall and with
another half day of work, a man could crawl through. Poor guy didn't
get much fishing time on that summer holiday.
A star drill on a hammer drill will go through a mountain. Forget the hammer
just a hammer. Men have drilled deep holes for hundreds of years in this
Fast - depends on the material.
Big - do a circle and sledge it out.
@ home at Lions' Lair with our computer lionslair at consolidated dot net
NRA LOH & Endowment Member
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member
We had a guy come in to core drill holes for computer cables in our
1917 poured concrete warehouse converted to offices. Floors were about
18" thick from the cores that were pulled. 6" hole, took most of a
day. You could go oversize, stick in Sonotube and pour cement in
around it if you needed a close fit or a really particular size. They
cemented in iron pipe with chafing bushings on the ends for the cables.
Have no idea what it cost, but it's got to be better than having at it
with a hammer drill.